How does one apply an overturning moment created by a gear in a shaft simulation?

I am trying to run a simulation on a shaft that has a large gear installed.  I have had no issues setting up the bearing suppors and  applying the torques, radial load and axial loads.  The overturning moment (bending moment) is however giving me some grief.  I do not have a face to apply it to.  Any help is greatly appreciated.

Thanks

SolidworksSimulation